What are the most precise criteria for assessment of efficacy of phytase for poultry and which sources of phytase is most effective regarding releasing of P from NPP and why.
Thanks the question and for this great contributions. I also think that another precise way to quantify this will be to evaluate P digestibility, myo-inositol, and the IP esters (IP1 to IP6) levels in the ilea digesta content and in possibly in fecal material following feeding a diet with known level of phytase.